text: /*
   * Class providing utilities functions.
   */
  
  #ifndef UTILITIES_H
  #define UTILITIES_H
  
  #include <iostream>
  #include <fstream>
  #include <vector>
  #include <sstream>
  #include <chrono>
  #include <algorithm>
  #include <tins/tins.h>
  #include <bitset>
  #include <type_traits>
  
  typedef unsigned short u16;
  typedef unsigned long u32;
  
  using namespace Tins;
  
  
  std::string getIPv4Class(const std::string &ipAddress);
  
  void convertIPv4toArray(const std::string &IP, unsigned short IP_bytes[]);
  
  void split_str(const std::string& s, char delim,std::vector<std::string>& v);
  
  u16 tcp_sum_calc(u16 len_tcp, u16 src_addr[],u16 dest_addr[], bool padding, u16 buff[]);
  
  bool check_tcpChecksum(const std::string &ipAddressSender, const std::string &ipAddressReceiver, TCP tcpPkt);
  
  template<class T>
  std::string integral_to_binary_string(T byte);
  
  #endif //UTILITIES_H
  